And the Indy movies/shows are also completely different because theyre not even chronological. Temple is a prequel to Raiders and the show is of course him as a kid. Maturing isnt really an option.

The point is Indiana Jones doesn't work in the 70's and later. Will we ever see a modern archeologist in the same vein? If we do, it will be a different character from a video game or something, not Indiana Jones.

So the only way you could bring Tony Stark into the far future would be science fiction or reboot. His father lived in the 40's as an adult. Stark made his contributions in modern times. The events in Avengers will probably always be referenced at some point in MCU films, so it won't be wiped out from the histroy books. I don't see Iron Man movies for the next 30-40 years. Maybe the next 5-8 years tops, with RDJ playing most if not all those films.

Eventually the character will be introduced to a new generation where the depicted technology is even closer to reality than it is today. That will be a reboot however.